if the circumference of a circular sign is 72π inches, then what is the radius? hint: use formula c = 2πr

Can someone me do math because i am having a breakdown rn because i don’t get it

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?

Interpret the following expression (5y^2-7)^3/(2y)^2